FIND

FIND

THE FRAMEWORK FOR INTERNAL NAVIGATION AND DISCOVERY

Github : FIND

Main Page : FIND

MQTT Documentation : FIND

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Retrieve FIND client for Android through Play Store (search for "find hypercube")

Retrieve FIND server from Github. For a Raspberry Pi, select the arm binaries. If your Pi has WiFi and you want to use it as a client for learning, too, then also retrieve and install the fingerprint client from this page.

Some notes on using a Pi as a client:
Note it usually does not make much sense because usually you actually don't move a Pi that's connected to mains power, so you can just learn a single 'location' (one room). To use a phone is easier. If you still want to, always remember to use sudo.
If you encounter problems such as 14:27:35.615 scanWifi - INFO 008 Gathering fingerprint with '/sbin/iw dev wlan0 scan -u' 14:27:35.625 main - WARN 009 Scan failed, will continue after a rest then try sudo ./fingerprint -iwlist.

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""NOTE"" this is a start to help with integration please feel free to edit and add more information.

###MQTT binding How to use MQTT Binding to get the data from FIND's mqtt server to OpenHAB

openhab.config file

mqtt:find.url=tcp://ml.internalpositioning.com:1883
mqtt:find.clientId=OpenHAB
mqtt:find.user=YOURGROUP
mqtt:find.pwd=YOURPASSWORD

###Running your own FIND server You can run your own find server like this:
pi@tvpi:~/find $ ./find-2.1-linux-arm -mosquitto findPID -mqtt mymqttserver:1883/ -mqttadmin finduser -mqttadminpass findpasswd tvpi:8003

then it'll connect to a MQTT server on mymqttserver port 1883 with a 'findPID' being the process ID of the mosquitto server process, using credentials 'finduser' and password 'findpasswd'. If you're using mosquitto (probably everybody does, no?), you can add authentication using curl -X PUT "http://YOURGROUP/mqtt?group=YOURGROUP and then FIND will automatically manage the passwd file and restart mosquitto using a SIGHUP signal. Also, use mosquitto_passwd <passwordfile> finduser to add credentials. mosquitto_passwd ain't included in the Raspian mosquitto distribution, you need to g**gle where to find it. Find publishes to mqtt channel 'YOURGROUP/location/YOURUSER'. You can watch mqtt events like this: mosquitto_sub -v -h mymqttserver -p 1883 -t 'YOURGROUP/#'

Reflect the server in openhab.cfg:

mqtt:find.url=tcp://localhost:1883
mqtt:find.clientId=OpenHAB
mqtt:find.user=YOUR-OPENHAB-MOSQUITTO-USER
mqtt:find.pwd=YOUR-OPENHAB-MOSQUITTO-PASSWORD

###openHAB items You need to add the username of the person to track to get the information in. the JSONPATH will pull the current location.

location.items file

String	mqqtfind_david				"David FIND [%s]"	(All)	{mqtt="<[find:YOURGROUP/location/USERNAME:state:JSONPATH($.location)]"}